Hello everybody! 
I'm Masha, I'm 32, I live in England, I raise 2 children who go to school) 
School is quite a lot of stress, both for children and for parents, and constant lessons and preparation for tests in specialized subjects drove Me crazy ( 
I became nervous, stopped sleeping with my husband and a nervous tic began, it was terrible… 
It's good that my friends advised me to find sites with solutions, and try to do homework according to their methodology. 
By the way, a good website 
https://www.controlworks.ru/kontrolnaja-rabota-narechiju/
https://www.controlworks.ru/kontrolnaja-po-geografii-8-klass-rossija/
https://www.controlworks.ru/kontrolnaja-summa/
https://www.controlworks.ru/gdz-kontrolnaja-rabota-3-klass-russkij-jazyk/
https://www.controlworks.ru/fizika-9-kontrolnaja-rabota-otvety/
https://www.controlworks.ru/gdz-po-kontrolnaja-rabota-po-matematike-peterson/
https://www.controlworks.ru/kontrolnaja-rabota-matematike-4-klass-2/
 
There are no ads, convenient search and a lot of valuable information about test papers! 
To be honest, I began to sleep peacefully, sex and peace in the family were restored, thanks to such sites where you can find solutions and devote more time to your favorite things! 
Good luck!